Security by spatial reference: Using relative positioning to authenticate devices for spontaneous interaction

Rene Mayrhofer, Hans Gellersen, Mike Hazas

Research output: Chapter in Book/Report/Conference proceedingsConference contribution

13 Citations (Scopus)


Spontaneous interaction is a desirable characteristic associated with mobile and ubiquitous computing. The aim is to enable users to connect their personal devices with devices encountered in their environment in order to take advantage of interaction opportunities in accordance with their situation. However, it is difficult to secure spontaneous interaction as this requires authentication of the encountered device, in the absence of any prior knowledge of the device. In this paper we present a method for establishing and securing spontaneous interactions on the basis of \emph{spatial references} that capture the spatial relationship of the involved devices. Spatial references are obtained by accurate sensing of relative device positions, presented to the user for initiation of interactions, and used in a peer authentication protocol that exploits a novel mechanism for message transfer over ultrasound to ensures spatial authenticity of the sender.
Original languageEnglish
Title of host publicationUbiComp 2007
Subtitle of host publicationUbiquitous Computing - 9th International Conference, UbiComp 2007, Proceedings
Number of pages18
Publication statusPublished - 2007
EventUbicomp 2007 - Innsbruck, Austria
Duration: 16 Sept 200719 Sept 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4717 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


ConferenceUbicomp 2007
Internet address


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